Molding form for use in producing concrete burial vaults and the like



Oct. 25, 1949. c. A. LANDON 2,486,038

MOLDING FORM FOR USE IN PRODUCING CONCRETE BURIAL VAULTS AND THE LIKEFiled Feb. 25, 1947 2 Sheets-Sheet 1 Oct. 25, 1949. c. A. LANDON2,486,038

MQLDING FORM FOR USE IN PRODUCING CONCRETE BURIAL VAULTS AND THE LIKEFiled Feb, 25, 1947 Q 2 Sheets-Sheet 2 /a Y /a 1 FIG. 47.

3mm I 5 (karlasflQLan don/ mama mw m Patented Oct. 25, 1949 MOLDING FORMFOR USE IN PRODUCING CONCRETE BURIAL VAULTS AND THE LIKE Charles A.Landon, Columbus, Ohio Application February 25, 1947, Serial N 0.730,800

2 Claims. (01. 25-130) This invention relates to molds or forms for usein the casting of concrete articles or devices and, more particularly,to the formation of concrete burial vaults.

Molding forms hitherto used in the formation of the open-bottomed hoodsections of concrete burial vaults have been objectionable in severalimportant respects, particularly in the matter of the difficultyencountered in their use when removing the forms from the moldedconcrete bodies. Usually, the forms must remain within and around theconcrete body for extended periods of time, that is, until the body,following pouring, sets and hardens to a degree permitting the connectedform members to be separated from contact with the walls of the concretebody and removed therefrom.

Such molding forms include an internal metallic core section and anouter form section having side and end walls which are spaced from theadjacent walls of the core section. After the setting and hardening of aconcrete body formed between said section, the outer section is removedfrom contact with the body so that the latter may be lifted to removethe same from the internal core section. During such lifting operations,the tendency has been for the walls of the concrete body in contact withthe core section to scale or score, leaving substantial deposits thereofin adherence with the walls of the core section, a condition renderingthe cast body unsuitable in many cases for usage.

The present invention, therefore, has for its objects, among others, toprovide an improved mechanical molding form for producing the hoodsections of concrete burial vaults wherein improved means are providedof a mechanical nature by which the side and end walls of the internalform or core section are flexed laterally and inwardly in a manner tobreak adherence with the cast concrete body in contact therewith,whereby to avoid injury to the latter in the operation of removing thecast body from the form; to provide a molding form of this character inwhich the wall-flexing means for the core section is so constructedthat, following inward flexing of the core walls, the entire coresection may then be moved vertically and downwardly to break adherencebetween the top wall of the core section and the adjacent top wall ofthe cast conment with the outer walls of a cast concrete body, so thatfollowing the releasing of the walls of the core section, and the outerside and end walls from engagement with the cast body, the latter isrendered freely accessible for a lifting operation in which it isremoved completely from the molding form; and to provide a molding formwhich permits of rapids production of cast concrete bodies and in whichthe form remains in active position in contact with the cast body for areduced period of time as compared with the forms of the prior art,whereby to permit a single molding form to be used in a given period oftime in a greater number of molding operations than is now possible withconventional apparatus.

With these and other objects and advantages in view, the inventionconsists in the novel features of construction, combinations of elementsand arrangements of parts hereinafter more fully described and pointedout in the appended claims.

In the accompanying drawings:

Fig. l is a top plan view of a molding form for producing cast concretearticles, and constructed in accordance with the present invention;

Fig. 2 is a vertical longitudinal sectional view taken through themolding form;

Fig. 3 is an end elevational view thereof;

Fig. 4 is a vertical transverse sectional view taken through the form onthe plane disclosed by the line 6-4 of Fig. 2;

Fig. 5 is a detail vertical transverse sectional view on an enlargedscale and disclosing more particularly the cams employed for flexing theside walls of the core section of the form;

Fig. 6 is a sectional view on the plane indicated by the line 6-6 ofFig, 5;

Fig. '7 is a detail horizontal sectional view on the plane indicated bythe line 'il of Fig. 3.

Referring more particularly to the drawings, my improved molding form ina preferred embodiment comprises a base frame It composed of angle ironsand substantially rectangular in configuration. Positioned on the baseframe is a platform II which, also, is substantially rectangular inconfiguration, being composed of longitudinally extending angle irons l2and a plurality of relatively spaced transversely extending angle irons[3, all of which being rigidly united. The horizontal webs of the angleirons l2 and the end angle irons l3 are formed with openings M, whichloosely receive positioning studs I5 carried by the lower edges of theouter vertically disposed side plates it of the molding form and theadjoining vertically disposed end plates [1 thereof. The upper edges ofthe plates l6 and I! may be formed with outwardly and downwardlydirected flanges l8 for reenforcing and handling purposes. Also, theend. plates, and the side plates if desired, may be formed withoutwardly directed shoulder-producing formations [9.

The side plates I6 have their vertical end edges, as shown in Fig. 7,formed with laterally turned flanges 20 which terminate in inwardlydirected angularly disposed webs 2|. To fasten the adjoining edges ofthe side and end plates in a detachable but rigidly joined inanner, useis madeof end yokes 22. The ends of these yokes terminate in laterallyextending lugs 23, which are formed with threaded apertures for the:reception Of clamping screws 24. The inner ends er these screws bear onthe angular webs 2| of the flanges 20. When the screws are tightened,the side plates L6 are forced against the edge flanges "of thej'eridplates inj a firm and'securem'anii'e'r.

By this "cdnstruction, the outer walls of the Iiioldi ng form 'areretained in rectangular order 'during 'castin'g and setting operations,and when these operations have been completed, the screws 2'4are'loos'end and the yokes22 removed, so'that the side and end platesmay oscillate about the axesprovided by the positioning of the studs "15in the. openings [4 of the platform, thus removing the side andf'endplates from engagement with a cast cementitious body produced in theform.

In association with the outer walls of the form, use is 'm'ajde of aninner form or core section 25. ThisjCdr section is formed preferablyfromjsheet metal and comprises an open-bottomed structure havingvertical side walls '26, end walls 2l and an arched top wall'2'8. Theside and end w'alls'26 and 27 of the core section are appropriatelyspaced fromthe'side plates I 6 and the end plates 'll forming the'outerwalls of the molding or' 'c'asting form, whereby to provide spaces 29forfthe reception of the'cementitious mixture which is poured into suchspaces for the purpose of producirlgjthe hood section30 ofaconcretegrave vault. Thejbottomsjofthe spaces 29 are "closed by means"ofa rectangular frame 3!, which is substantially T-shape'd incross-sectional configuratioh, the frame'3l resting loosely on the platomil Following-the pouring of the cjementitioi'l's 'mixture forming thehood section 30,'and the subse- "quent 'settingand hardening periodtherefor, and when it is desired to remove the molded "hood"s'ection'from theform, the "side walls 26 andthe end walls "21 'of thecore section are first flexed inwardly and laterally for the purposeofbreaking any v adherence between these walls and the 'cementitious body.Such flexing may be accomplished advantageously by mounting rotatably'inthe transverse angle members I3 of the platform a I pair of spacedlongitudinally extending shafts 32. v

As shown more particularly in Figs. "and 6, these shafts have fixedthereto at longitudinal intervals pairs of spaced disks 33, each diskbeing formed with a hub 34, which is pinned as at '35 to one of theshafts 32. Each complemented-"pair of disks carries studs 36, whichreceive roller sleeves 31. These sleeves are disposed for engagemen'twith the inner surfaces "of substantially square, ringlike cam members38, the latter being w'elded or otherwise permanently secured to "thelower ends of "bars 39, 'whichare rigidly fastenedto the inner surfaces'of the sidewalls '26. The shafts 32 are provided at one end-0f "theform with manipulating handles 40, by which the shafts may beconveniently rocked. By reference to Fig. 4, it will be noted that whenthe shafts are rocked to position the roller sleeves on the outside, theside walls 26 will be flexed, or caused to assume true verticalpositions in parallelism with the side plates 16. However, as shown inFig. 5, when the shafts 32 are rocked to position the sleeves 31 on theinner sides of the cam members 38, the side walls'are flexed laterallyabout their regions of joinder with the top wall 28, thus removing theside walls from adhering engagementwith'th'e surfaces of the concretebody 30.

The end walls 2'! are similarly flexed by the provision o f the screwsdisclosed at 4|. These screws are mounted in threaded openings providedtherefor "inthe end members of the platform II, and the inner ends ofthe screws press on'the lower flexible portions of the end walls 21 toflex the latter inwardly and free the same from adhering engagement withthe cast c'oncrete b'ody. ti After such lateral 'fiexing of the side andend walls 26 and 21 of the'core section, the-latter is moved downwardlyand vertically by continuing the rocking-aetionof the's'hafts '32, sothat the 'rollered sleeves 3T 'willeng age with the 'lower'portions ofthe cam members 38, thusr'emoving the arched top Wall 28 of thecoresection from'adhering engagement with the cementitious top wall of thehood'section'flfl. Following such release of the core section of themolding form, the side and end plates I6 and I! are disconnected "byremoving the end yokes '22, allowing these plates to swing upwardly andlaterally or, if desired, to'be removed entirely 'from'the platform I l.The formed vaultsectionmay thenbe removed from the form by'engaging'ca-ble means, not shown, with the shoulders 42 formed on theends of the hood section 30'bythe'b'eveled-formations IQ of the endplates l'l. Thecablemeans may form a part'of'a commercial hoist orcrane, by which the completed hood section may be lifted and transferredto desired positions of deposit.

lit will'thusbe seenthat'the present invention provides a readilyassembled forming means for the casting of various concrete articles,such, for example, as vault sections, although theapparatus'is not,liinted to this particular use. The "apparatus may bequic'kly Set up topermit of a given pouringoperation, and upon the conclusion of thisoperation, and the subsequent setting a d hardening period, the vaultmay be "conveni'ently removed from the forming-manner preventing injuryto the cast product, this object being attained-primarily by'the lateralflexin of the walls of the core section before the core-section islowered to release the top wall jthereof froineng agemeht with the topwall-of the cast product, and, also, by the outward l'ateral movement ofthe etterside and'end plates "I 6 *and 'll of the form.

I l m 1, In apparatus for molding hollow cementitious bodiesfia base,an'openbottom core positioned on-said base, said core embodying-side,end and top walls bf-sheet metal, a pairof longitudinally extendingtransversely spaced rock shafts journaled in bearings "carried bysaidfbase, bars secured to the 'innersurfaces'ofthe sidewalls of saidcore, cam extensions formed with (the lower ends of said bars andthrough which extensions said rock shafts pass disk'means "disposed inregistration'with 'said'bars and'rotatable with said shafts, andtransversely disposed studs carried by said disk means and engageablewith said cam extensions to flex the side walls of said core inwardlyupon initial movement of said rock shafts in one direction and move saidcore downwardly upon the following movement of said rock shafts in thesame direction.

2. In a form for molding cementitious articles, a base frame, an openbottom core positioned on said base frame, said core embodying side, endand top walls forming a unitary one-piece structure, said side wallshaving limited flexibility in a lateral direction, substantiallyrectangular cam devices carried by said side walls contiguous to theirlower edges, rock shafts journaled in said base frame and extendingthrough said cam devices, and studs positioned in said cam devices androtatable with said rook shafts for flexing said side walls inwardlyupon initial rotation of said rock shafts in a given direction and movethe core bodily downwardly toward said base frame upon continuedsubsequent movement of said rock shafts in said given direction.

CHARLES A. LANDON.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 2,219,106 Kruckenberg Oct. 22,1940 2,344,738 Seifert Mar. 21, 1944 2,461,928 Schopf Feb. 15, 1949

